Even if the airports are near max capacity (and I think that's probably only LAX) there could be a lot more passenger-miles.
Right now most SFO-LAX flights are on nothing larger than a 737 or A320, and on LAX-SJC I seem to wind up on some abominable regional jet.
There's a lot of room to increase capacity by flying wide bodies if the demand exists. Compare to the SYD-MEL route, a similar distance, where you're likely to wind up on an A330 or 767.
Right now most SFO-LAX flights are on nothing larger than a 737 or A320, and on LAX-SJC I seem to wind up on some abominable regional jet.
There's a lot of room to increase capacity by flying wide bodies if the demand exists. Compare to the SYD-MEL route, a similar distance, where you're likely to wind up on an A330 or 767.